Welcome. Best source I have is the book Spanish Best by Terry Weiland. Viuda y Hijos means Widow and sons of J J Sarasqueta. Very little info other than that and some mention of possible relation ship to others of that name. The author believes that it was a small one or two man concern with small output of boxloxk and sidelock doubles. Someone else will no doubt come in with further information. Lagopus.....